OrderID required

Hi,

I have posted an order transaction to the database and am firing the PrintReceipt hook. I wish to get the OrderId for this posted transaction. I am using a c# class with a process method. The method fires and I try the line:

intWorkOrderID = Session.Transaction.OrderID;

But intWorkOrderID is always zero. Any help on how I get the OrderId after posting to the database would be appreciated.

Thanks,

Warren